An object of the present invention is to suppress a decrease in the amount of sorting wind supplied to a swing sorting mechanism. A threshing device includes a swing sorting mechanism for sieving and sorting while transferring sorting objects, and a blower unit provided below and in front of the swing sorting mechanism for supplying a sorting wind to the swing sorting mechanism. A. Between the upper part of the cover 15b that covers the blower fan 15a of the blower A and the lower end of the front part of the swing sorting mechanism 13, the sorting wind supplied from the blower A is applied to the cover 15b, the swing sorting mechanism 13, There is provided a windbreak section B which suppresses the flow through the gap and forward. [Selection diagram] FIG.【課題】揺動選別機構に供給される選別風の風量の低下を抑制する。【解決手段】脱穀装置は、選別対象物を移送しながら篩い選別する揺動選別機構１３と、揺動選別機構１３の前下方に設けられ、揺動選別機構１３に選別風を供給する送風部Ａとを備える。送風部Ａの送風ファン１５ａを覆うカバー１５ｂの上部と、揺動選別機構１３の前部の下端部との間に、送風部Ａから供給される選別風がカバー１５ｂと揺動選別機構１３との間を抜けて前へ流れるのを抑制する防風部Ｂが設けられている。【選択図】図３
